Control valve

STP Top Guiding Parabolic Plug Type Control Valve is the basic type among SH***0 high performance control valves. Metal-seated quick-changeable trim combination. Insensitive to impurities with low cavitation design. Fast and easy to maintenance due to its rotational symmetry. This series is characterized by optional metal to metal sealing and PTFE-soft sealing supported by an additional Elastomer O-ring. STP series can be used in a wide range of applications, especially suitable for the fluid with entrained particle and larger temperature variety because of won't being locked.

Standard Specification

Valve Body

Type: Cast globe Valve

Nominal Size: DN*5, *0, *5, *2, *0, *0, *5, *0, **0,

**0, **0, **0, **0, **0, **0

Nominal Pressure: ANSI **0, **0

DIN  PN*6, *5, *0

JIS  *0K, *0K, *0K

GB   PN1.6, 2.5, 4.0 MPa

End Connection: Flange  ANSI B*6.5　RF, RTJ

DIN***3/***4/***5 RF

JISB***1 RF

JB/T*1 RF

JB/T*2.2　FM

Weld: ANSI B*6.5　SW(DN≤*0); BW(DN＞*0)

Face to Face Dimension:

ANSI**0RF, JIS*0K  (IEC********1 *7 Series)

ANSI**0RF, JIS*0K, JIS*0K (IEC********1 *8 Series)

ANSI**0/**0 RTJ (ASME B*6.*0 CLASS **0/**0RTJ)

DIN PN*6, *5, *0 (DIN****-F1)

GB PN1.6, 2.5, 4.0 MPa  (ISO***2  1 Series)

Please refer to table 6.1~6.4

Body Material:Please refer to table1 Please refer to figure 3 for Operated Temp. &Pressure Range

Bonnet Type:STD type……**6℃~**0℃; **0℃~**0℃

Radiation fin type……**0℃~**0℃

(Please pay attention to the different Temp. &Pressure Range of material)

Packing Material:PTFE V-ring  compound  packing,graphite compound packing,

graphite packing,

Operating Temp. &Pressure range is shown in table 2,figure2

Seal Gasket:Spiral wound gasket(PTFE***6,Flexible Graphite***6),

Graphite with metal gasket(Graphite***6,Graphite***4)

Valve Trim

Plug Type：Parabolic column plug

Flow Characteristic:EQ%,Linearity,Quickly opening(Please refer to figure4)

Trim Material:Please refer to table 3 for STD material assembly,operated Temp. &Pressure Range

Actuator

Type:Multi-spring diaphragm

Air Supply:Max. 6bar

Ambient Temp.：**0℃~**0℃

Spring range:As shown in Table 5.1~5.5

Air Connection:G1/8(SA1)ï¼›G1/4(SA2)ï¼›G3/4(SA3)

STD Specification:As shown in Table 5.1~5.5

Accessory

Positioner,Filter-regulator valve,Solenoid valve,Limit switch，

Valve position Transmitter,Booster relay,Lock-valve,Handwheel,etc.

Action

Air to open，Air to close

Performance

Range ability：*0:1

Seat leakage:Metal seal is according to ANSI B*6.**4 ClassⅣ，ClassⅤ

Soft seal is according to ANSI B*6.**4 Classâ…¥

Hysteresis:3%(Without Positioner)  1%(With Positioner)

Linearity:±5%(Without Positioner) ±1%(With Positioner)

Rated CV:As shown in table 4

Allowable pressure differential:As shown in table 5.1~5.5

Figure Size:As shown in figure5.1,5.2,table 6.1~6.4

Weight of product: As shown in table 6.1~6.4

Specifications:

â—‹Special inspection: Flow characteristic test,material test,low temperature test,steam test,non-damages test

â—‹copper-free treatment

â—‹non-standard painting

â—‹dust and sand proof

â—‹vacuum service

â—‹tropical area proof

â—‹completely oil-free,water-free treatment

â—‹special air piping and fitting

â—‹strong corrosion proof

â—‹stainless steel bolt and nut for exposed parts

â—‹cold area proof